Hi, its a just a piece of advise and also base on my experiences. Why not try stucco coats with fiberglass lath or mesh and a stucco bonding agent for stronghold for your walls. This is what I am using and it also gives out exterior house a unique designs because of its tinted primer stucco base. You can check its products specifics and price list at http://www.sunlinemesh.com/pail-and-bags-products-price-list/.
